How to Troubleshoot the SRS

DTC (Diagnostic Trouble Codes)


The self-diagnostic function of the SRS system allows it to locate the causes of system problems and then store this information in memory. For easier troubleshooting, this data can be retrieved via a data link circuit.


Precautions


Reading the DTC


When the SRS indicator is on, read the DTC using either of the following methods:

PGM Tester ‘‘SRS'' Menu Method

Connect the Honda PGM Tester (A) to the 16P Data Link Connector (DLC)(1), and follow the Tester's prompts in the
‘‘SRS'' menu. If the Tester indicates no DTC, DTC 3-6 to 3-10, DTC 4-6 to 4-10, DTC 9-1, or DTC 9-2, double-check by selecting ‘‘SCS'' on the display, and watching the SRS indicator.

 

‘‘SCS'' Menu Method (retrieving the flash codes):


The SRS indicator (A) indicates the DTC by the number of blinks when the DTC pin box (B) is connected to the Data Link Connector (DLC)16P (1).

1.Make sure the ignition switch is OFF, and wait for 10 seconds. Then connect the DLC pin box (A) to the Data Link Connector (DLC) 16P. If you don't wait 10 seconds, the SRS unit won't be completely reset or output DTCs.

 

2.Connect the DLC pin box terminals No. 4 and No. 9 with a jumper wire (C), and push the operation switch.

3.Turn the ignition switch ON (II). The SRS indicator comes on for about 6 seconds, and then goes off. Then it will indicate the DTC.

4.Read the DTC.

5.Turn the ignition switch OFF, and wait for 10 seconds. Then disconnect the DLC pin box from the Data Link Connector (DLC) 16 P.


6.Proceed with the troubleshooting procedure for this DTC.

Patterns of DTC Indications:

 

Reading the main code: 

Reading the sub code: 


Example of DTC Indications:


 

Reading the SRS Indicator Method (with service check connector (2P) models):


The SRS indicator indicates the DTC by the number of blinks when the SCS short connector is connected to the service check connector (2P).

1.Make sure the ignition switch is OFF, and wait for 10 seconds. Then connect the SCS short connector (A) to the service check connector (2P) (B). If you don't wait 10 seconds, the SRS unit won't be completely reset or output DTCs.

 

2.Turn the ignition switch ON (II). The SRS indicator comes on for about 6 seconds, and then goes off. Then it will indicate the DTC.

3.Read the DTC.

4.Turn the ignition switch OFF, and wait for 10 seconds. Then disconnect the SCS short connector from the service check connector (2P).

Erasing the DTC Memory


Special Tools Required
SCS short connector (  07PAZ-0010100)
 



To erase the DTC(s) from the SRS unit, use a Honda PGM Tester (see the Honda PGM Tester SRS vehicle System Supplement) or the following procedure.

1.Make sure the ignition switch is OFF.

2.Connect the SCS short connector (A) to the MES connector (2P) (1). Do not use a jumper wire.

 

3.Turn the ignition switch ON (II).

4.The SRS indicator will come on for about 6 seconds, and then go off. Remove the SCS short connector from the MES connector (2P) within 4 seconds after the indicator goes off.

5.The SRS indicator will come on again. Reconnect the SCS short connector to the MES connector ( 2P) within 4 seconds after the indicator comes on.

6.When the SRS indicator goes off, remove the SCS short connector from the MES connector ( 2P) within 4 seconds.

7.The SRS indicator will blink two times indicating that the memory has been erased.

8.Turn the ignition switch OFF, and wait for 10 seconds.

9.Turn the ignition switch ON (II) again. The SRS is OK if the SRS indicator comes on for 6 seconds and then goes off.

Troubleshooting Intermittent Failures


If there was a malfunction, but it doesn't recur, it will be stored in the memory as an intermittent failure, and the SRS indicator will come on.

After checking the DTC, troubleshoot as follows:

1.Read the DTC (see ‘‘Reading the DTC'').

2.Erase the DTC memory (see ‘‘Erasing the DTC Memory'').

3.With the shift lever in Park or neutral, start the engine, and let it idle.

4.The SRS indicator will come on for about 6 seconds and then go off.

5.Shake the wire harness and the connectors, take a test drive (quick acceleration, quick braking, cornering), turn the steering wheel fully left and right, and hold it there for 5 to 10 seconds. If the problem recurs, the SRS indicator will come on.

6.If you can't duplicate the intermittent failure, the system is OK at this time.

Initializing the OPDS (Occupant Position Detection System) Unit


Special Tools Required
SCS short connector (  07PAZ-0010100)
 

DLC pin box (  07WAJ-0010100)
 


When a seat-back cover, seat-back cushion, and/or OPDS unit is replaced, initialize the OPDS by following the procedure below.
NOTE: Make sure the passenger's seat is dry. Set the seat-back in the normal position, and make sure there is nothing on the front passenger's seat.

1.Make sure the ignition switch is OFF.

2.Connect a DLC pin box (A) to the DLC (16P) (1), and connect the DLC pin box terminals No.4 and No.9 with a jumper wire (B), and push the operation switch.

3.Connect the SCS short connector (C) to the MES connector (2P) (2). Do not use a jumper wire.

 

4.Turn the ignition switch ON (II).

5.The SRS indicator (D) comes on for about 6 seconds and goes off. Remove the SCS short connector from the MES connector within 4 seconds after the SRS indicator went off.

6.The SRS indicator comes on again. Reconnect the SCS short connector to the MES connector within 4 seconds after the SRS indicator comes on.

7.The SRS indicator goes off. Remove the SCS short connector from the MES connector within 4 seconds.

8.Watch the SRS indicator.
  • If the indicator blinks two times and then stays on, the OPDS is initialized, but the DTCs need to be erased. Go to 9, then erase the DTCs.
  • If the indicator blinks two times and then goes off, the OPDS unit is initialized. Go to 9.
  • If the indicator stays on without first blinking, the OPDS is not initialized. Read the DTC, and go to the appropriate page in the DTC Troubleshooting Index.

9.Turn the ignition switch off, and disconnect the DLC pin box from the DLC (16P).